How do environmental scientists deal with chemicals that sink to the bottom of an aquifer?
A) They leave them alone because the chemicals have not mixed with the drinking water supply.
B) They add a coagulating chemical to make sure the chemicals solidify and remain deep in the Earth.
C) They create a cone of depression some distance away to suck the contaminant in an opposite direction.
D) They pump them up through a well drilled to the bottom of the aquifer.
Answer: D
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What happens to the land surface when large ice sheets melt away?
A) It subsides because there is less ice on top. B) The land surface remains unchanged but seems lower because of the loss of ice. C) The land flexes upward due to isostatic rebound. D) The land rises because the rocks are warmer without the ice.
Only eight elements make up the vast majority of rock-forming minerals. Which of the following elements is not one of the eight?
A) Oxygen B) Hydrogen C) Iron D) Potassium
Although scientists think the actual number is considerably higher, there are at least ________ known species of plants and animals on Earth
A) 1,500 B) 15,000 C) 15,000,000 D) 1,500,000
The local high school in your hometown has a project where students are collecting water samples in collaboration with the local university. This project is an example of a(n)
A. Environmental literacy project B. Attempt to recruit students to the university C. Attempt to get high school students involved in environmental careers D. Citizen science project E. Early careers project